Probably not until after the next generation of consoles hits late next year and the lowest common denominator for game development is raised as a result. As long as most games are designed to run on the aging XBox 360, there isn't much need for that much CPU power for most games. Most of the games that do have decent support for more than 2 cores are the few titles that were designed more for PC first and then got cut down to work on the consoles.